Mass spectrometer and method for setting analytical conditions

The mass spectrometer improves detection sensitivity by deflecting interfering particles and optimizing electrode voltages based on mass-to-charge ratio, addressing the issue of reduced sensitivity due to interfering particles.

JP7893120B2Active Publication Date: 2026-07-22SHIMADZU SEISAKUSHO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SHIMADZU SEISAKUSHO LTD
Filing Date
2022-10-28
Publication Date
2026-07-22

AI Technical Summary

Technical Problem

Existing mass spectrometers face issues with interfering particles, such as neutral particles and photons, entering the detector, leading to decreased detection sensitivity and total target ion count.

Method used

A mass spectrometer configuration with an ion source, sampling cone, collision cell, mass separator, and detector, utilizing an axial shift optical system to deflect charged ions while allowing neutral particles to bypass the detector, and a control device to adjust electrode voltages based on mass-to-charge ratio for improved detection.

Benefits of technology

Enhances detection sensitivity by preventing interfering particles from reaching the detector while ensuring target ions are effectively detected.

✦ Generated by Eureka AI based on patent content.

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Abstract

To improve the detection sensitivity of target ions while preventing interfering particles that become noise from being taken into a detector.SOLUTION: An ICP-MS includes a control device, a collision cell and a first electrode provided on an optical axis of plasma, a second electrode provided on a detection axis, a mass separator, and a detector. For an axis-shifting voltage applied to each of the first electrode and the second electrode, the control device sets an axis shift voltage in the gas mode to a voltage obtained by adding an offset determined according to the mass-to-charge ratio of the target ion to the initial voltage in the gas-free mode.SELECTED DRAWING: Figure 4
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